Applicant's Father: Name. Passport No. Date of Naturalization. Signature.The form affidavit must be completed, notarized, and attached. Once completed this form must be provide to the Court. An unsworn declaration is a written statement, signed under penalty of perjury, and without the use of a notary. This article discusses registering other states' custody and support orders in Texas so that Texas courts can change and enforce them. Note: You may not use an Unsworn Declaration with a Waiver of Service in a Divorce case. 3. Affidavit of heirship texas. Complete, ready-to-be-signed legal documents. If you do not hire a lawyer you must complete and sign the Petition yourself.